How to use it
- Connect the gamepad.
- Start the test and do not touch the analog sticks during measurement.
- Observe how close the sample cloud stays to center.
- Review P95 center deviation; complete the confirmation round if the result is suspicious.
Want to isolate the cause?
Open Problem Isolator →If you need more than a drift value
The Gamepad Problem Isolator compares the same measurement under a second condition to help separate device, connection, and game-related causes.
Gamepad Drift & Deadzone Test
Measure center deviation only after the analog sticks are truly released. If movement occurs during the test, the round is invalid; one suspicious round does not declare drift.
Left stick drift—
Right stick drift—
Suggested deadzone—
StatusWaiting
Waiting for gamepad
Both sticks must first remain calm. If significant movement is detected after measurement begins, that round is excluded. A suspicious P95 value is not treated as a fault from one round; a second clean round is required. Health interpretation is limited for non-standard gamepad mappings.
Start when ready
You will be asked to release the sticks; measurement begins only after a calm center is confirmed.
Left stick sample trace
Points staying near the center are healthier.Right stick sample trace
The distribution direction helps reveal the drift direction.How to interpret the result
P95 represents most samples from a valid centered round only. A round with detected stick movement produces no result; a suspicious value is confirmed with a second round.
Test limitations
Axis mapping may differ on controllers with custom mappings; in that case Testarya shows observed deviation instead of a health verdict.
Privacy
The test runs in your browser. Supported history and report data in this version is stored locally in your browser using localStorage.
Frequently asked questions
What is stick drift?
Stick drift is a meaningful axis deviation from zero even after the analog stick is released.
What does a deadzone do?
A deadzone ignores small movement around center, reducing unwanted drift in games.
Important: Testarya results are based on input events observed by the browser. They should not be treated as definitive electronic diagnostics or a professional service report.